Marble-sawing machine



NITED STATES PATENT OFFICE.

R. G. PINE, OF NEWARK, NEW JERSEY.

IVIARBLE-SAWING MACHINE.

Specicaton of Letters Patent No.

To all whom it 'may concern.'

Be it known that I, ROBERT G. PINE, of Newark, in the county of Essexand State of New Jersey, have invented a new and useful Machine forSawing Marble in Polygonal Taper Form; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,in which- Figure l, is a longitudinal vertical section of myimprovement, a2, 0;, Fig. 2, showing the plane of section. Fig. 2, is ahorizontal section of ditto, y, y, Fig. l, showing the plane of section.

Similar letters of reference indicate corresponding parts in the twofigures.

The nature of my invention consists in having the saws attached to rodswhich work in sockets or guides the ends of the rods loeing attached tothe frame by jointed arms as will be presently shown and describedwhereby blocks of marble may be sawed in polygonal taper form.

To enable others skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, represents -a bed plate or platform in which rods a, are placed, saidrods 'being bent in the form of cranks so that their upper parts may beturned nearer to or farther apart from each other. On the upper parts ofthe rods a, sockets b, are placed, said sockets being fitted loosely onthe rods a. The upper ends of the sockets b, have eyes or apertures c,made through them in which rods (l, work, the eyes or apertures formingguides for the rods el. These rods have saws e, attached to them, a sawto each rod. The saws being between the sockets b. The

front ends of the rods 6l, are connected by jointed arms f, to the frontend of a frame B, which may be formed of a rod having its'front and backends bent as shown clearly in Fig. l. The lower part of the frame B, atits front end works in a guide g,which is attached to a socket g',placed on a rod 13,762, dated November 6, 1855.

c', permanently secured to the bed plate A. The lower part of the backend of the frame B, works in a guide j, attached to a socket 7J, placedon a rod Z, also permanent-ly secured to the bed plate A.

The back ends of'the rods d, d, are connected to the ends of a bar m,'by jointed armsn, n, and the center of the bar m, is attached to theback part of the frame B, as clearly shown in Fig. 2.

The guides g, j, cause the frame B, to work in a right line, and byturning the rods a, in proper position the rods cl, may be made to workparallel with each other, or by turning the two front rods a, inward ortoward each other the rods d, will work in right lines obliquely witheach other', the jointed arms f, n, compensating for the Obliquity ofthe rods cl.

The block of marble to be sawed is placed upon the bed plate A, the sawse, rods (l, and sockets b, I), g, la, being raised so that the block ofmarble may be placed underneath the saws which rest upon the marble. Areciprocating motion is then given the frame B, in any proper manner andthe saws e, e, will cut the two opposite sides of the marble block intaper form, the two front guides being set nearer to each other than thetwo back guides. The saws feed themselves to the work by their owngravity. IVhen thetwo opposite sides of the marble are sawed the blockis turned upon the bed plate and the two remaining sides are sawed.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is,

The frame B, connected by jointed rods f, n, to rods d, d, working insockets o, which are fitted loosely on rods a, when the above parts areall constructed and arranged in the manner and for the purpose setforth.

ROBERT Gr. PINE.

Vitnesses:

J. WV. CooMBs, l/VM. TUsoi-I.

